CN103957152B - IPv4 and IPv6 network communication method and NAT-PT gateway - Google Patents
IPv4 and IPv6 network communication method and NAT-PT gateway Download PDFInfo
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Abstract
The invention provides an IPv4 and IPv6 network communication method based on an NAT-PT gateway and the NAT-PT gateway. The IPv4 and IPv6 network communication method comprises the steps that a communication request sent by an IPv4 node or an IPv6 node is received; according to the communication request, whether the identity authentication information of the node and the identity authentication information of a target node are recorded or not is detected; if yes, the node and the target node are legal nodes, and the communication request is forwarded to the target node; otherwise, the node and/or the target node are/is notified to conduct identification authentication. According to the IPv4 and IPv6 network communication method and the NAT-PT gateway, whether identification authentication needs to be conducted on the source node and the target node is judged according to the communication request sent by the node, the problem that data can not be filtered by a network firewall in IPv4 and IPv6 network safety is solved, identity authentication is conducted on two communication parties, and therefore the safety of communication data is effectively guaranteed.
Description
Technical field
The present invention relates to internet device technical field, more particularly to a kind of IPv4 and IPv6 based on NAT-PT gateways
Network communication method, for the NAT-PT gateways of IPv4 and IPv6 network services.
Background technology
The most popular technology of system safety product is exactly firewall technology in network security, i.e., in Internet
(Internetwork, Internet) sets a fire wall and internal network between.It is connected into Internet's in the whole world at present
It is under firewall protection that 1/3rd are there are about in computer.
The technology of fire wall is realized being normally based on so-called " packet filtering " technology, and the standard for carrying out packet filtering is generally exactly
Formulated according to security strategy.In firewall product, the Standard General of packet filtering is in firewall box by network manager
Access control inventory in set.The standard that access control is generally basede on has：The source address of bag；The destination address of bag；Connection please
The direction (be connected into or connect) asked；Data pack protocol, such as TCP/IP (Transmission Control Protocol/
Internet Protocol, transmission control protocol/Internet Protocol) etc.；The type of service request, such as ftp (File
Transfer Protocol, file transfer protocol (FTP)), www (WWW) etc..
At present, with IPv4 (Internet protocol fourth edition) technology it is leading in data network, with the expansion of network size,
IPv6 (Internet protocol sixth version) technologies will gradually replace current IPv4 technologies with advantages such as its huge address spaces.So
And, it is this thoroughly to replace the long-term process of needs.At this for a long time from IPv4 to during IPv6 evolution, in order to share net
Network resource, needs to solve the problems, such as IPv4 networks and IPv6 networks intercommunication and communication security.
To ensure IPv4 networks and IPv6 network energy intercommunication, needs carry out protocol conversion at Interworking gateway, need
IP headings are modified, even needs to change application-dependent data sometimes.So IP of the data that network firewall is received
Address is modified, destroys integrity checking, it is impossible to reach the effect of data filtering, so as to also cannot just ensure IPv4 networks
With the safety of IPv6 network communication datas.
The content of the invention
Based on this, it is necessary to for the problems referred to above, there is provided a kind of IPv4 of guarantee communication data safety leads to IPv6 networks
Letter method, for the NAT-PT gateways of IPv4 and IPv6 network services.
A kind of IPv4 based on NAT-PT gateways and IPv6 network communication methods, including step：
The communication request that IPv4 or IPv6 nodes send is received, wherein the communication request includes the IP address of the node
And/or domain name, the domain name of destination node；
According to the authentication information that the communication request detects whether to record the node and the destination node, if
It is, and the node and the destination node are legitimate node, then forward the communication request to the destination node, are otherwise led to
Know that the node and/or the destination node carry out authentication, wherein the authentication information is whether node is legal
Node.
IPv4 and IPv6 network communication method of the present invention based on NAT-PT gateways, according to the communication request inspection that node sends
The authentication information whether NAT-PT gateways store active node and destination node is surveyed, so as to judge whether to need to the source
Node and destination node carry out authentication, and solving cannot be right by network firewall in current IPv4 and IPv6 network securitys
The defect that data are filtered, by the certification to communicating pair identity, the effective guarantee safety of communication data.
A kind of NAT-PT gateways for IPv4 and IPv6 network services, including：
Communication request receiver module, for receiving the communication request of IPv4 or IPv6 nodes transmission, wherein the communication please
Seek IP address and/or domain name, the domain name of destination node including the node；
Authentication information memory module, for the authentication information of memory node, wherein the authentication information is section
Whether point is legitimate node；
Authentication information detection module, for detecting whether the authentication information memory module stores according to the communication request
If so, and the node and the destination node are legal section there is the authentication information of the node and the destination node,
Point, then forward the communication request to the destination node, otherwise notifies that the node and/or the destination node carry out identity
Certification.
The present invention is used for the NAT-PT gateways of IPv4 and IPv6 network services, by detecting whether the communication request pair that is stored with
The node answered and the authentication information of the destination node, so as to judge for the communication request to be transmitted to the mesh
Mark node, or first authentication is carried out to the node and/or the destination node, effectively ensure that the body of communicating pair
Part, ensure the safety of communication data.
Description of the drawings
Fig. 1 is the schematic flow sheet of the inventive method embodiment；
Fig. 2 is the schematic flow sheet of node of the present invention or destination node authentication embodiment；
Fig. 3 is that node of the present invention communicates the structure chart of specific embodiment with destination node；
Fig. 4 is the structural representation of NAT-PT gateway embodiments one of the present invention；
Fig. 5 is the structural representation of NAT-PT gateway embodiments two of the present invention.
Specific embodiment
The present invention is embodied as based on the IPv4 and IPv6 network communication method of NAT-PT gateways below in conjunction with the accompanying drawings
Mode is described in detail.
As shown in figure 1, a kind of IPv4 based on NAT-PT gateways and IPv6 network communication methods, including step：
S100, the communication request for receiving the transmission of IPv4 or IPv6 nodes, wherein the communication request includes the node
IP (Internet Protocol, procotol) addresses and/or domain name, the domain name of destination node；
NAT-PT (Network Address Translation-Protocol, the network address of subsidiary protocol converter
Transducer) gateway is responsible for completing IPv4 and IPv6 including the conversion work including address, agreement, with IPv4 address pools, from
IPv6 is used when giving out a contract for a project to IPv4 transfers, the address in address pool be for changing IPv6 messages in source address, support DNS-
ALG (Domain Name System-Application Layer Gateway, domain name system-ALG), realize by
IPv4 nodes initiate with the communication between IPv6 nodes；
S200, the authentication letter for detecting whether to record the node and the destination node according to the communication request
Breath, if so, and the node and the destination node are legitimate node, then into step S300, otherwise into step S400；Its
Described in authentication information be whether node is legitimate node；
IP address or domain name, the domain name of destination node according to the node of communication request detects the NAT-PT gateways
Whether be stored with corresponding authentication information；Condition into step S400 is that the authentication that only record has the node is believed
Breath, or only record has the authentication information of the destination node, or the identity of the node and the destination node is recognized
Card information is not recorded；
S300, the forwarding communication request are to the destination node；Forward the communication request to the destination node and
The destination node can be realized according to the response that the communication request is returned according to scheme known in the state of the art；
S400, notify that the node and/or the destination node carry out authentication；Not through the node of authentication
And/or destination node sends ID authentication request and is authenticated by the NAT-PT gateways to certificate server.
The node and destination node authentication can be realized by many modes, for example, in one embodiment, such as
Shown in Fig. 2, can include the step of the node or the destination node authentication：
S410, the ID authentication request for receiving the node or destination node transmission, wherein the authentication please
Ask the identity comprising the node or the destination node；
Need the node or destination node that carry out authentication that ID authentication request is sent to into NAT-PT gateways；The body
Part mark includes the digital certificate of the node or the destination node, and/or MAC (Media Access Control, medium
Access control) address etc.；
S420, the identity of NAT-PT gateways is transmitted to into certificate server with the ID authentication request；
The digital certificate of the identity of NAT-PT gateways including the NAT-PT gateways, and/or MAC Address etc.；NAT-
PT gateways can complete the conversion of its own agreement according to the agreement of node or destination node, and for example, the node is IPv4 nets
Network node, the destination node is IPv6 network nodes, then will during the ID authentication request of node described in NAT-PT gateway forwards
The identity of its own is converted into the form of IPv4 agreements, when forwarding the ID authentication request of the destination node by itself
Identity is converted into the form of IPv6 agreements, and the wherein protocol translation of NAT-PT gateways can be achieved by the prior art；
S430, receive the authentication result that the certificate server sends, wherein the authentication result comprising the node or
The authentication information of the destination node, and the authentication information of the NAT-PT gateways；
The authentication information of the NAT-PT gateways is whether gateway is legal gateway；
S440, the authentication information for recording the node or destination node simultaneously forward the authentication result to the node
Or destination node.
After the completion of the node or the destination node authentication, in order that communication two ends communicate in time, in a reality
In applying example, after step S440, step can also be included：The node or destination node record the identity of the NAT-PT gateways
Authentication information, and authentication end is returned to the NAT-PT gateways；The NAT-PT gateways receive the identity to be recognized
Card end, and notify that the node resends the communication request.
Authentication due to being related to two heterogeneous networks (IPv4 and IPv6) node, the certificate server needs to support
Two kinds of agreements of IPv4 and IPv6, i.e. dual stack, can simultaneously certification heterogeneous networks node, wherein supporting recognizing for dual stack
Card server can be realized by method well known in the prior art.
In order to be better understood from the specific embodiment of IPv4 of the present invention and IPv6 network communication methods, with reference to one
Specific embodiment is described in detail.
As shown in figure 3, the node 10 in IPv4 networks will communicate with the node 60 in IPv6 networks, node 10 needs
The IP address of the inquiry of the domain name of node 60 to node 60, this process is used to need to be completed by dns server first.
For convenience of description, it is assumed that IPv4 networks and IPv6 networks only have a dns server, are respectively dns servers
20 and dns server 50, while the domain name for assuming node B is www.abc.com, the address of its IPv6 is 2001::1.
Node 10 wants the IP address of query node 60, sends DNS query request, the inquiry to dns server 20 first
Request bag contains the information such as the domain name of IP address, domain name and node 60 of node 10, and dns server 20 is found without above-mentioned domain
Name record, then inquires about to dns server 50；
When the inquiry request reaches NAT-PT gateways 30, the NAT-PT gateways 30 detect whether respectively the section that is stored with
The authentication information of point 10 and node 60, finds the node 10 and node 60 not through authentication, then described
NAT-PT gateways 30 send ID authentication request and notify to node 10 and node 60 respectively；
The node 10 receives the ID authentication request and notifies, sends ID authentication request to the NAT-PT gateways
30, wherein the ID authentication request includes digital certificate or MAC Address of the node 10 etc.；
The ID authentication request and the identity of oneself that the NAT-PT gateways 30 send the node 10 for receiving turns
Certificate server 40 is issued, wherein the certificate server 40 supports dual stack；
The information of the forwarding of NAT-PT gateways 30 of the certificate server 40 pairs is authenticated, and authentication result is returned
To the NAT-PT gateways 30, wherein authentication result includes the authentication information of node 10 and the body of the NAT-PT gateways 30
Part authentication information；
The NAT-PT gateways 30 receive the authentication result, and whether record node 10 is legitimate node, and forwarding is recognized
Card result is to node 10；
Whether the identity that node 10 records the NAT-PT gateways 30 is legal, and returns an authentication end extremely
The NAT-PT gateways 30；
Meanwhile, the node 60 receives the ID authentication request and notifies, sends ID authentication request to the NAT-
PT gateways 30, wherein the ID authentication request includes digital certificate or MAC Address of the node 60 etc.；
The ID authentication request and the identity of oneself that the NAT-PT gateways 30 send the node 60 for receiving turns
Certificate server 40 is issued, wherein the certificate server 40 supports dual stack；
The information of the forwarding of NAT-PT gateways 30 of the certificate server 40 pairs is authenticated, and authentication result is returned
To the NAT-PT gateways 30, wherein authentication result includes the authentication information of node 60 and the body of the NAT-PT gateways 30
Part authentication information；
The NAT-PT gateways 30 receive the authentication result, and whether record node 60 is legitimate node, and forwarding is recognized
Card result is to node 60；
Whether the identity that node 60 records the NAT-PT gateways 30 is legal, and returns an authentication end extremely
The NAT-PT gateways 30；
The NAT-PT gateways 30 receive the authentication end that node 10 and node 60 are returned, and notify node 10
The inquiry request is resend to the NAT-PT gateways 30；
The NAT-PT gateways 30 detect the authentication information for recording node 10 and node 60, and the He of node 10
Node 60 is legitimate node, the IPv6 networks for just forwarding the inquiry request to be located to node 60；
Dns server 50 inquires the corresponding IP address of the domain name of node 60 for 2001::1, sending to dns server 20 should
Answer message；
When the NAT-PT gateways 30, the NAT-PT gateways 30 are from the address pool that it is safeguarded for the response message
An available IPv4 address (being assumed to be 202.116.78.10) is found as the IPv4 addresses of node 60, and creates corresponding
Map record；
Amended response message return node 10, node 10 just can be communicated by 202.116.78.10 with node 60.
Similar, if node 60 wants the IP address of query node 10, response message to be back to the NAT-PT gateways 30
When, the NAT-PT gateways 30 can add the NAT-PT gateway prefix of 96 as node 10 before the IPv4 addresses of node 10
IPv6 addresses, so as to node 60 just can be communicated by the IPv6 addresses of the node 10 with node 10.
Based on same inventive concept, the present invention also provides a kind of for IPv4 and the NAT-PT gateways of IPv6 network services,
The specific embodiment of gateway of the present invention is described in detail below in conjunction with the accompanying drawings.
As shown in figure 4, a kind of NAT-PT gateways for IPv4 and IPv6 network services, including：
Communication request receiver module 110, for receiving the communication request of IPv4 or IPv6 nodes transmission, wherein the communication
Request includes IP address and/or domain name, the domain name of destination node of the node；
Authentication information memory module 120, for the authentication information of memory node, wherein the authentication information is
Whether node is legitimate node；
Authentication information detection module 130, for detecting that the authentication information memory module 120 is according to the communication request
The authentication information of no the be stored with node and the destination node, if so, and the node and destination node are legal
Node, then forward the communication request to the destination node, otherwise notifies that the node and/or the destination node carry out body
Part certification.
The authentication of the node and destination node can be realized by many modes, for example, in one embodiment,
As shown in figure 5, the NAT-PT gateways can also include：
Certification request receiver module 140, for receiving the ID authentication request that the node or destination node send, wherein
Identity of the ID authentication request comprising the node or destination node；
Certification request forwarding module 150, for the identity of NAT-PT gateways to be forwarded with the ID authentication request
To certificate server 200；
Authentication result receiver module 160, for receiving the authentication result of the transmission of the certificate server 200, wherein described
Authentication information of the authentication result comprising the node or the destination node, and the authentication of the NAT-PT gateways
Information；
Authentication result forwarding module 170, it is described for the authentication information of the node or destination node to be stored in
Authentication information memory module 120, and the authentication result is forwarded to the node or destination node.
After the completion of the node or the destination node authentication, in order that communication two ends communicate in time, in a reality
In applying example, the NAT-PT gateways can also include certification message reception module, in the node or the destination node
After recording the authentication information of the NAT-PT gateways, the authentication knot that the node or the destination node are returned is received
Beam message；The message notification module being connected with the certification message reception module, for terminating receiving the authentication
During message, notify that the node resends the communication request.
Authentication due to being related to two heterogeneous networks (IPv4 and IPv6) node, the certificate server needs to support
Two kinds of agreements of IPv4 and IPv6, i.e. dual stack, can simultaneously certification heterogeneous networks node, wherein supporting recognizing for dual stack
Card server can be realized by method well known in the prior art.
The present invention is used for other technical characteristics and the inventive method phase of the NAT-PT gateways of IPv4 and IPv6 network services
Together, will not be described here.
Embodiment described above only expresses the several embodiments of the present invention, and its description is more concrete and detailed, but and
Therefore the restriction to the scope of the claims of the present invention can not be interpreted as.It should be pointed out that for one of ordinary skill in the art
For, without departing from the inventive concept of the premise, some deformations and improvement can also be made, these belong to the guarantor of the present invention
Shield scope.Therefore, the protection domain of patent of the present invention should be defined by claims.
Claims (6)
1. a kind of IPv4 based on NAT-PT gateways and IPv6 network communication methods, it is characterised in that including step：
Receive the communication request that IPv4 or IPv6 nodes send, wherein the communication request include the IP address of the node and/
Or domain name, the domain name of destination node；
According to the authentication information that the communication request detects whether to record the node and the destination node, if so,
And the node and the destination node are legitimate node, then forward the communication request to the destination node, are otherwise notified
The node and/or the destination node carry out authentication, wherein the authentication information is whether node is legal section
Point；
The ID authentication request that the node or the destination node send is received, wherein the ID authentication request is comprising described
The identity of node or the destination node；
The identity of NAT-PT gateways is transmitted to into certificate server with the ID authentication request；
The authentication result that the certificate server sends is obtained, wherein the authentication result includes the node or the target section
The authentication information of point, and the authentication information of the NAT-PT gateways；
Record the authentication information of the node or the destination node and forward the authentication result to the node or institute
State destination node.
2. the IPv4 based on NAT-PT gateways according to claim 1 and IPv6 network communication methods, it is characterised in that turn
Send out authentication result described to the node or the destination node step, also including step：
The node or destination node record the authentication information of the NAT-PT gateways, and return authentication end
To the NAT-PT gateways；
The NAT-PT gateways receive the authentication end, and notify that the node resends the communication and asks
Ask.
3. IPv4 according to claim 1 and 2 and IPv6 network communication methods, it is characterised in that the certificate server
Support two kinds of agreements of IPv4 and IPv6.
4. a kind of NAT-PT gateways for IPv4 and IPv6 network services, it is characterised in that include：
Communication request receiver module, for receiving the communication request of IPv4 or IPv6 nodes transmission, wherein the communication request bag
Include IP address and/or domain name, the domain name of destination node of the node；
Authentication information memory module, for the authentication information of memory node, wherein the authentication information is node being
It is no for legitimate node；
Authentication information detection module, for detecting whether the authentication information memory module stores according to the communication request
The authentication information of node and the destination node is stated, if so, and the node and the destination node are legitimate node, then
The communication request is forwarded to the destination node, otherwise notifies that the node and/or the destination node carry out authentication；
Certification request receiver module, for receiving the ID authentication request that the node or destination node send, wherein the body
Identity of part certification request comprising the node or the destination node；
Certification request forwarding module, for the identity of NAT-PT gateways and the ID authentication request to be transmitted to into certification clothes
Business device；
Authentication result receiver module, for receiving the authentication result that the certificate server sends, wherein the authentication result bag
Authentication information containing the node or the destination node, and the authentication information of the NAT-PT gateways；
Authentication result forwarding module, for the authentication information of the node or the destination node to be stored in into the certification
Information storage module, and the authentication result is forwarded to the node or the destination node.
5. NAT-PT gateways for IPv4 and IPv6 network services according to claim 4, it is characterised in that also wrap
Include：
Certification message reception module, for recording the authentication of the NAT-PT gateways in the node or the destination node
After information, the authentication end that the node or the destination node are returned is received；
The message notification module being connected with the certification message reception module, for receiving the authentication end
When, notify that the node resends the communication request.
6. NAT-PT gateways for IPv4 and IPv6 network services according to claim 4 or 5, it is characterised in that institute
State certificate server and support two kinds of agreements of IPv4 and IPv6.
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